Four measures to solve the broken end of roving unwinding

With the continuous increase of yarn winding and the extensive use of yarn suspension machines, the roving has serious consequences of end breaking when the spun yarn is unwinding. Our company (DADI TEXTILE) analyzed the causes of breakage during roving unwinding, and recorded ground yarns to solve the problem, and finally reduced the breakage during rough unwinding.

Reasonably set the roving twist coefficient and adjust the position of the guide rod

In the face of broken ends that are sensitive to peeling off during yarn unwinding, we reasonably set the roving twist coefficient, adjust the position of the guide rod and the position of the roving spindle, maintain the micro-movement of the hanging spindle, and eliminate the clogging of the bell mouth. This kind of decapitation.

Control the distortion points without thick joints and long thin

Endless roving knots and broken ends caused by long details, as long as the roving twist is controlled to restore health.

Correct operation to reduce doffing breakage

On the suspended doffing yarn, in order to facilitate the spinning up of the roving tube, an auxiliary spinning loop is connected to the roving tube. Due to the doffing operation of the roving lathe, the care value of the roving The interestingness of yarn breakage in the loop is universal. As long as you follow the correct positioning and doffing operation method, it can also be avoided. Correct positioning and doffing operation method: maintain the correct positioning of the dragon rib height, the starting position of spinning must be higher than the position of the pile loop. When driving after the doffing, the dragon tendon will go up and the roving coming out, but from the position of the pile loop, But first retain and hold down the pile loops, and occasionally adhesive breaks will occur. The reason is that the length of the roving on the roving tube is already very short, so the impact on production is very important.

Reduce the breakage caused by roving adhesion

There is also a type of yarn breakage in which the yarn is completely and completely intermittent. The type of end breakage is as follows: when the large yarn is unwinding, it will often appear in the middle and small yarns (especially the small yarns in the future); in the chemical fiber, there are more and more fine yarns, and the pure cotton is soft. There are few rovings; some rovings are sticky and some are not sticking; they are more likely to occur during warm time; some rovings even form a small adhesion ring (sometimes a bundle of fibers) behind the middle and small yarns, resulting in undefined position breaks. The reason is the breakage caused by the adhesion of the roving due to various reasons. Solutions for broken ends: control the draw weight without reducing the rate, especially to reduce the thinner sliver; replace the automatic aging false twister, the automatic repair false twister must be used at any time when the chemical fiber is completed; the flyer hollow arm should be completed at any time The available car strips are guaranteed to be polished; it can be adjusted according to the slow temperature, especially the winter control to overcome the high side, to solve the main yarn winding adhesion and breakage; reasonable design of the roving twist coefficient (too small error) and spinning Yarn tension; roving holding time is too long; reducing roving defects caused by various reasons.

Through the implementation of the above measures, the breakage caused by the unwinding of the roving is obviously reduced, the labor intensity of the production lathes is improved, the production efficiency is improved, the production cost is reduced, and the quality is improved.